Electonista has this story, about the new 4K DSLR from Canon. It shoots 4K 4096×2160 video at 24 FPS 8 bit 4:2:2 video. It has an 18.1 Megapixel full-frame CMOS sensor with a maximum ISO of 25,600 and 12FPS continuos shooting like the EOS 1D X it is based on.
With video it shoots 4K with the full sensor, but 1080 can either be the full sensor for full sharpness and 35MM equivelency, or it can use a middle portion which allows for 60P frame rates.
The LCS can remain on even with external HDMI attached, and it has a headphone jack as well.
It will be released in 2012, but has not been given a price yet.
Sure no PL mount, but very exciting. If only they would move some of this tech to lower end cameras as well.